Piston king



June 24, 1930. B. YOUNG T 1,768,470

PISTON RING Filed Sept. 4, 1929 1 W" 5 3 1a 7,18 15?; i5 4 5 4 HM,

I I HUI Z9 12 Z 16 7.4 v a. f- 1/ d QEW 4 E527? 25w 24 5 14 INVENTOR.

I BERN/7RD YOU/VG.

zax.

Arron/m.

i 1 tion and the appended claims.

Patented June 24, 1930 I N ATES PATENT opp if F RIQ l P7 23 ear ie t-1A PISTON m r e 7 A plicati filed Septembe 4 1929.7 fi No. 390,248.

This inventionrelates to a piston ring or j acent the upper end of the piston i nto the packing which is used upon the pistons in groove 6 so that the. compression pressure internal combustion engines, pumps, coinin the cylinder is lead back of the rings for pressors or the like. the purpose of forcing the rings outwardly.

'5 An object of my invention is :to regulate so that they will bear against the wall of the 55 the pressure of the ring against the wall of cylinder and then seal the space between the cylinder. I the piston and the cylinder.

Another object is to provide a ring which The inner area of the rings 2-3 may be is made up of two or more components parts, different so, [that one ring or the other is a wearing ring or rings, and a control ring forced outwardly by a greater force dueto 0' which holds the wearing ring in check. thel'pressure inthe groove 6. The theory of Other objects, advantages and features" of this arrangement is described in my c0-pend invention may appear from the accompanying application, serial number 361,299 for ing drawing, the subjoined detailed descrippiston rings. I i

Without a control ring,thewearing ringfl '65 In the drawing 2 woul'dfbe forced against the wall of the Figure 1 is a fragmentary longitudinal cylinder so tightlythat there would be ex- 1 sectional View of a cylinder with a piston cessive wear,bu t I equalize or control this therein, the piston being broken away to outward force against the wearing ring by show interior construction. means of the control ring 3. That is, as 70 Figure 2 is a fragmentary plan view of the wearing ring2 is forced outwardly, the

one of the rings with the links in position control ring 3 will be forced inwardly or '7 therein. contacted and conversely as the control ring 5 Figure 3 is a side elevation of one of the 3 is expanded or moved outwardly, the wear- 2 links.

Figure 4; is a fragmentary plan View of wardly. v a one of the rings the view being taken at the I accomplish this adjustment between the split in the ring. two rings in y the following manner: The Figure 5 is a fragmentary side elevation ring 2 is split'as at 8'and the ring 3 is split of a ring,the view being taken at the slit as at 9. The openings or splits 8-4.) arena in the ring. positioned one above the other as shown in Figure 6 is a transverse sectional view of Figure 1,. and leakage is prevented past a slightly modified form of ring. these splits by a sealing strip 10 which ex- Referring more particularly to the drawtends under the bottom ring and upwardly I ing, my piston ring 1 comprises a wearing on the inside of both of the rings. .85 a ring 2 and a control ring 3. As here shown, The rings 2, 3 are coupled together at the wearing ring is 011 top, and the control the split in each by means of links 11-12. ring below. The wearing ring which al- Theuring 2 is provided with slots or recesses ways is in contact with the walls of the l314,, one suchslot or recess being adjacylinder 4, and it is the purpose of my incent the side of the split 8. The slots 1314 90 vention to so control the pressure or wearing are formed in the bottom of the ring 2 and ring against the wall of the cylinder so that the ring 3 which also is formed with a pair no excessive wear will be created. That'is of slots identical in construction and arthe wearing ring presses against the wall of rangement to .the slots in r1ng2. The only i the cylinder with a comparatively equal difference is that in the ring 3 the slots are 95. pressure irrespective of the position of the in the top surface of the ring. These slots piston in the cylinder. are shown at 15. 15. i V

The piston 5 is provided with the usual The rings 23 are also reduced n thick annular ring groove 6 in which the ring 1 ness between the slots 13 -14as shown at 17 I is positioned. A duct 7 extends from ad so that the links 11--12 will fit between the 10s ing ring 2 will be contracted or moved'in- 76 7 extending lug rings. The link 11 is provided with an up wardly extending lug 18 at the one end thereof, and a downwardly extending lug 19 on the opposite end thereof. The lug 18 fits in the slot 16 in the ring 3, and the lug 19 fits in the slot 13 of the ring 2. The link 12 is provided with an upwardly extending lug 20 at one end thereof, and a downwardly 21 at the other end thereof. Similarly the lug 20 fits in the slot 14 of the ring 2 and the lug 21 fits in the slot 15 of the ring 3. That is, one end of each of the links 1112 is secured to the upper ring on one side of the slot therein, and the other end is secured to the lower ring on the other side of the slot. By this arrangement as the lower ring expands or contracts, the upper wearing ring will move in the opposite direct-ion, thus the wearing ring is effectively controlled and prevented from pressing with too great a pressure against the wall of the cylinder.

In Figure 6 I have shown a slightly modified form of ring which is shrouded, that is, the upper wearing ring 22 is provided with a de vending annular skirt or shroud 23 whic 1 covers the control ring 24. The pur pose of this arrangement is to prevent any pressure from being exerted on the outer face of the control ring by reason of leakage past the wearing ring. With this arrangement thecontrol ring is always free to be acted upon by the pressure in the ring groove so that the wearing ring is effectively controlled at all times. The connecting links 25, 26 are the same as those previously described, and need not be described again in detail.

Having described my invention, I claim:

1. A piston ring comprising a pair of superimposed rings, both of said rings being split to permit expansion and contraction,

' and links secured at one end to one of said rings and at the other end to the other of said rings, said links extending across the splits in said rings.

2. A piston ring comprising a pair of superimposed rings including an upper wearing ring and a lower control ring, both of said rings having splitstherein, said splits being arranged one above the other, a pair of links, one end of one of said links being secured to the wearing ring and the other end of said link being secured to the control ring, saidlinks extending across the splits in said rings.

3. A piston ring comprising a pair of the ring,rsaid control ring having notches formed therein, said notches being arranged one on either side of the split in the control ring, a pair of links, upwardly and downwardly extending lugs one on either end of each of said links, said lugs fitting into said grooves in the rings, one lug fitting into a groove in the wearing ring and the other lug fitting into a groove in the control ring and said links extending across the splits in the rings.

4;. A piston ring comprising a pair of superimposed rings, both of said rings being split to permit expansion and contraction, and links secured at one end to one of said rings and at the other end to the other of said rings, said links extending across the splits in said rings, and a downwardly extending shroud on said wearing ring, said shroud extending over and enclosing the wearing ring.

In testimony whereof, I affix my signature.

BERNARD YOUNG. 

